unpack-trees: preserve index extensions

diff --git a/t/t7063-status-untracked-cache.sh b/t/t7063-status-untracked-cache.sh
index 0667bd9dd3e8bc650bc4e47ac9fcde5d63ef0d11..e5fb892f9575fda4baf0b2a0e6b31cf13a0d6c0b 100755 (executable)
--- a/t/t7063-status-untracked-cache.sh
+++ b/t/t7063-status-untracked-cache.sh
@@ -661,4 +661,26 @@ test_expect_success 'test ident field is working' '
        test_i18ncmp ../expect ../err
 '
 
+test_expect_success 'untracked cache survives a checkout' '
+       git commit --allow-empty -m empty &&
+       test-dump-untracked-cache >../before &&
+       test_when_finished  "git checkout master" &&
+       git checkout -b other_branch &&
+       test-dump-untracked-cache >../after &&
+       test_cmp ../before ../after &&
+       test_commit test &&
+       test-dump-untracked-cache >../before &&
+       git checkout master &&
+       test-dump-untracked-cache >../after &&
+       test_cmp ../before ../after
+'
+
+test_expect_success 'untracked cache survives a commit' '
+       test-dump-untracked-cache >../before &&
+       git add done/two &&
+       git commit -m commit &&
+       test-dump-untracked-cache >../after &&
+       test_cmp ../before ../after
+'
+
 test_done